Sun-dial and compass.



M. H. SLATER.

sun DIALAND COMPASS..

APPLICATION FILED SEPT- 25 1515.

.l ,258, l 60. mme@ Maf. 5, 1918.

snr ernten.

MABEL H. SLATER, OF WEBSTER, MASSACHUSETTS.

SUN-DIAL Ann COMPASS.

Application led'September 25, 1516.

To N yMio/1t t may concern.'

Re it known that l, Manen H. Smyrne, a citizen of the United States,residing at llvebster., in the county of lYorcester and State ofMassachusetts, have invented new and useful Improvements in Sun-Dialsand Compasses, of which the following is' a speciication.

rlhis invention relates to a combined sun dial and compass.

yThe object of the invention is to provide a small. compact and simpleinstrument constructed and arranged to be carried in the pocket butwhich is adapted to be used to detern'iine either the points of thecompass or the hours of the day.

'The invention consists in the combination and arrangement of parts setforth in the following specification' and particularly pointed out inthe claim.

Referring to the drawings:

Figure 1 is a front elevation of an instrument embodying my invention.

Fig. 2 is a section taken on the line 2-2 of Fig. 1.

Fig'. f5 is a detail section taken on the line le-3 of Fig. 1,illustratino' the two positions of the style of the sun dial and themeans for maintainingsaid style in either of said positions.

Like numerals refer to like parts in all views of the drawings.

ln the drawings, 5 is a case, preferably of a design similar to that ofa watch case, thus rendering the same more suitable for carrjyfing inthe pocket. A dial (i is mounted upon the case 5 in any suitable.manner, said dial being constructed of suitable transparent material,such as glass, and having' graduations '.1', 7 upon the face thereof.The dial 6 preferably constitutes a closure for the case 5 or tieequivalent'of the crystal of a watch.

A magnetic needle 8 is pivotally mounted, preferably' Within the case 5,adjacent to the inner face of said dial 6 and completely incased toprevent moisture from gaining access thereto. Furthermore, said magneticneedle 8 is mounted in the usual manner upon a pivot 9 so as to turnfreely and permit the same to be turned to its normal position by themagnetic forces exerted thereon.

Marks indicating the points of the compass are provided in said case 5,preferably upon a dial l arranged at the bottom of Specification ofLetters Patent.

rawaitedV Mar; 5, 191s.'

SeriellV N0. 121,920; i

said case but adjacent to and parallel with the plane of rotation oftheneedle 8 and also parallel with the .-d'ial 6.-

i stem 1l is preferably attached to one side of said case to provide asupport for means adapted to be operated to holdthe needle in a fixedposition within the case when the compass is not in use .orwhen thesaineV is being carried in the pocket. instrumentalities for clampingtheneedle form no partof this invention, therefore a description thereof isnot believed to beV necessary. Y y

arranged adjacent to the outer face of the dial 6 is an angle plate l2known to those skilled in the art as a style or gnomoin The style 12when in its-operative position is disposed substantially at right anglesto the face of the dial 6 and in a predetermined position on said dialwith respect to the north and south points of the compass and the edge18 of said style, is inclined upwardly from the dial at a predeterminedangle to cooperate with the graduations 7 on the face of the dial 6,which correctly determine the time of day by the shadows projected uponthe dial by said style in intercepting the suns rays.

' he face of the dial G is also provided with a semi-transparent area 1twhich arc shaped to include the graduations 7 said semi-transparentsection being preferably formed by grinding the portion of the surfaceof said dial included withinthe area`14.

This semi-transparent section is provided for the urnose of distinuishino' between` the shaded and light portions of the dial, the

Vdividing line of which would be almost iin- `the right direction. Y -0The style 12, in its normal position, Ioccu.-

pies considerable space and is not in a convenient form to be placed inthe pocket, therefore said style has been pivotally mounted so as topermit it to be swung from its normal position with respect to the faceof the dial 6 into a position lying substan- The tially parallel withsaid dial and against its face.

To accomplish this result, said style has a cylindrical member l5,formed adjacent to the outer end thereof, which cylindrical member isjournaled to rotate in a bearing l''attaohed to the side of the case 5adjacent to said stein ll. rlhe lower edge of the style l2 is rounded at17 and preferably lies along the upper tace ot the dial G, permitting`said style to be rotated from its normal to its folded position Withoutinterference and at the saine time constituting a support therefor.

T he outer end of the cylindrical member l5 has a plate 18 attachedthereto haring notches 19 and 2OV in its periphery said notchescorresponding to the two positions ot said style. A resilient member ordetent 2l is mounted in the stein 1l to occupy the notches 19 and 20 andto yieldingly position said style in its two positions.

Stops and Q3, disposed adjacent to the notches 19 and 20 respectively,are provided for the purpose of limiting the movements of said style. Tostill further enlarge the usefulness of this instrument, the centralportion of the dial 6, which central portion is of little use inconnection with the coinpass or the sun dial, is made into fa mirror 24.Y

Having thus described my'invcntion what I claim and desire by LettersPatent to secure is:

In combination, a case, a magnetic needle pivotally mounted in saidcaso, a style pir otally arranged to roel; about an axis disposedsubstantially parallel with the plane of rotation oi said inagneticneedle, said style being movable from a position substantially parallelwith said plane to a position substantially at right angles thereto, aplate secured to said style, said plate having two notches in theperiphery thereof corresponding with the two positions ot said style,and a resilient member attached to said casing, adapted to occupy one orthe other of said notches to yieldingly maintain said style either inits position substantially parallel with said plane of rotation orsubstantially at right angles thereto.

In testimony whereot1 l have hereunto set my hand 1n presence of twosubscribing witnesses.

MABEL H. SLATER. Witnesses:

CHARLES S. GOODING, SYDNEY E. TAFT.

Copies of this patent may be obtained for five cents each. by addressingthe Commissioner of Patents.

Washington, D. C.

